Results 71 to 80 of about 10,346 (211)

Impact of spatially varying transport coefficients in EMC3-Eirene simulations of W7-X and assessment of drifts

Nuclear Fusion
Modelling the scrape-off layer of a stellarator is challenging due to the complex magnetic 3D geometry. The here presented study analyses simulations of the scrape-off layer (SOL) of the stellarator Wendelstein 7-X (W7-X) using spatially varying ...
David Bold, Felix Reimold, Holger Niemann, Yu Gao, Marcin Jakubowski, Carsten Killer, Victoria R. Winters, Nassim Maaziz, the W7-X Team   +8 more
doaj   +1 more source

Ion temperature gradient turbulence in helical and axisymmetric RFP plasmas

, 2015
Turbulence induced by the ion temperature gradient (ITG) is investigated in the helical and axisymmetric plasma states of a reversed field pinch device by means of gyrokinetic calculations.
Predebon, I., Xanthopoulos, P.
core   +1 more source

Stellar atmospheres

This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor F.R.N.
Puls, Joachim, Herrero, Artemio, Prieto, Carlos Allende   +2 more
openaire   +2 more sources

Stellar populations

, 2013
This is a summary of my lectures during the 2011 IAC Winter School in Puerto de la Cruz. I give an introduction to the field of stellar populations in galaxies, and highlight some new results. Since the title of the Winter School was {\it Secular Evolution of Galaxies} I mostly concentrate on nearby galaxies, which are best suited to study this theme ...
openaire   +3 more sources

On Stellar Rotation.

The Astrophysical Journal, 1942
Not ...
openaire   +1 more source

Economically optimized design point of high-field stellarator power-plant

Nuclear Fusion
High temperature superconductors (HTSs) expand the design space of stellarator power-plants (PPs) toward high magnetic fields B , enabling compact major radii R .
Victor Prost, Francesco A. Volpe
doaj   +1 more source

Suppression of tearing modes by External Rotational Transform in a Tokamak-Stellarator hybrid configuration on J-TEXT

Nuclear Fusion
A Tokamak-Stellarator hybrid configuration has been established on the J-TEXT tokamak by the application of stellarator-like External Rotational Transform (ERT) coils.
Yangbo Li, Nengchao Wang, Bo Rao, Feiyue Mao, Chuanxu Zhao, Zhengkang Ren, Zhiyu Meng, Zijian Xuan, Song Zhou, Ruomu Wang, Xixuan Chen, Wei Zheng, Yasuhiro Suzuki, Zhonghe Jiang, the J-TEXT Team   +14 more
doaj   +1 more source

Stellar ages and stellar rotation

, 2016
Stellar ages will play a big role in the next generation of astronomy. Useful to exoplaneteers and galactic archaeologists alike, this relatively under-exploited stellar property is currently limited by the precision of dating techniques. The work presented in this thesis contributes incrementally to a greater understanding of rotation period decay in ...
openaire   +2 more sources

Stellarator fusion systems enabled by arrays of planar coils

Nuclear Fusion
We present an overview of a novel electromagnetic coil configuration for stellarators and its application to two near-term fusion systems. The novel coil configuration is the planar coil stellarator, able to implement precisely-quasisymmetric 3D magnetic
D.A. Gates, S. Aslam, B. Berzin, P. Bonofiglo, A. Cote, D.W. Dudt, E. Flom, D. Fort, A. Koen, T.G. Kruger, S.T.A. Kumar, M.F. Martin, A. Ottaviano, S. Pasmann, P.K. Romano, C.P.S. Swanson, L. Tang, E. Winkler, R. Wu   +18 more
doaj   +1 more source

Stellar Chromospheres [PDF]

International Astronomical Union Colloquium, 1980
Important progress in our understanding of stellar chromospheres has occurred in the past few years as a result of new observations, developments in spectral line formation theory, and the application of that theory to the construction of detailed model chromospheres.
openaire   +1 more source